Here is one of the best on the West Coast. It is an 18u wood bat tournament that had 24 teams from 4 different states last year.
www.westcoastsummerseries.com We'll be going back for sure.
You might also want to check out this website if you're intereted in playing in the Pacific Northwest
www.nwstar.net They run some pretty good 19u tournaments, and are helping us with an extensive schedule of games to make a road trip up there feasible for us.